The World | IN BRIEF / CANADA

More Farms Targeted in Probe of Disease

Investigators placed more Canadian farms under quarantine in a search for the cause of North America's first case of "mad cow" disease in a decade. The Canadian Food Inspection Agency said 13 farms are now quarantined -- eight in Alberta, where the bovine spongiform encephalopathy was found, two in Saskatchewan and three in British Columbia.

The last three were feed suppliers. Cattle feed from animal sources contaminated with BSE is considered the most likely cause of the infected cow.